I'm off to Malaysia and singapore in August and am thinking of getting a wide angle zoom for my canon 450. I'm looking at the tokina 12-24 or tamaron 10-24.

So what i'm after is a bit of advice, for example:

Is it a good idea to buy abroad? Will I get value for money.

Is it a brain dead idea and i should buy one here.

If it is a goer, which country would be best? Can you recommend any shops.

What are the possible problems/annoyances that could occur.

Many thanks for any advice.